I have used Antivir on my two user account PC without incident, but after last weeks update Guard statis only shows on which ever account gets logged on first. It is definitely active as you can check to see that has scanned different files, but I would like it to show active on both accounts. Tried new install after thorough uninstall, but same thing, and downloaded and tried repair, modify on other account. Also the activate Guard is greyed out in menu of Antivir Icon as well. No problems with any other Antiviruses, except the BSOD that Stem confirmed happened to him using SKPF and AOL AVS. I'm using Windows XP with Comodo Firewall now.